Mortise-lock



(N0 Model.)

0. COK'B.

MORTISE LOCK.

Patented May .6, 1890'.

I VW!! `pointed out in the claims.

OSBORN R. COOKE, OF SALEM, OHIO.

iVlORTlSE-LOCK.

SPECIFICATION forming part of Letters Patent N0. 427,157, dated May 6 3, 1890.

Application led January 6, 1890.

To @ZZ whom it may concern;

Be it known that I, OsBoRN R. COOKE, a resident of Salem, in the county of Columbiana and State of Ohio, have invented certain new and useful Improvements in Mortise-Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine.

My invention relates to an improvement in mortise-locks; and it consists in certain novel features of construction and combinations of parts, as -will be hereinafter described, and

In the accompanying drawings, Figure 1 shows my improved lock in side elevation and plan. Fig. 2 is a view in side elevation, one side of the case being removed. Fig. 3 is a View in horizontal section. Fig. 4f is a view of one of the tumblers. Fig. 5 is a View of the bolt and bolt-catch. Fig. 6 is a view of the strike-plate. Fig. 7 is a view in perspective of the bolt-actuating device. Fig. 8 is a similar view of a modiiied torni thereof, and Fig. 9 is a modified form of the slide-bolt catch.

A A represent a two-part cylindrical barrel, which constitutes the shell or case of the lock and that portion which is sunk into the mortise, and 1 isY the face-plate, to which the portion A of the casing is rigidly secured and the part A removably connected, and which plate is secured in the edge of the door in the usual manner byhneans of screws or other devices. The rigid part A of the case terminates at its rear end in a thin round web 2, which forms the end of the lock. Various openings are formed in the case or shell for the key, the screw or rivets 3, which hold the two parts together and to receive other parts, which will be incidentally referred to in the course of the description.

The numeral et represents the slide bolt or latch. This bolt is adapted to slide within the walls of the parts A A of the shell or case upon the flattened bearings 5 5. rlhe forward end 7, which protrudes through the opening 6 in the face-plate and enters the catch-plate in order to fasten the door, is preferably beveled in the usual manner to bear upon the catch-plate; but this particular form is not absolutely necessary, as the bolt is normally held back in the case or shell. The central portion 8 of the bolt is cut away, leaving only the narrow sides 9 9, which rest and slide upon the bearings 5 5, as previously mentioned, and between which the tumblers and other operating mechanism of the lock are located. ,The rear end of the slide-bolt terminates in a pair of outwardly-projecting pintles 9 9', through the medium of which connection is had from the knob for withdrawing the bolt from the catch-plate, and this is effected in the following manner: A slide-plate 10- is adapted to slide back and forth as the knobs are turned. This plate is furnished at its forward end with a pair of upwardly-turned lugs 12 12, which lie in front of the piiitles 9 9, and also with a transverse groove 13, which receives these pintles for the purpose of drawing the bolt backward.

The rear end of this plate is made to straddle the sleeve 14, which has an angular interior formation-to receive the shank of the knobs which operates it. Said sleeve has a projection 15, which extends about a third way around itsr side, and this projection is adapted to abut against the u'pwardly-turned lugs 16 16 on the rear end of the plate 10 whenturned far enough in either direction for the purpose of forcing the plate back to withdraw the bolt; but by the contact of the end of the plate with the end of the case this movement is limited, so that it may be easily counteracted by the action ot the spring. The ends 17 17 of the sleeve 14 are fitted in the round openings 19 19 formed for them, and the outer edges of the plate 10 and of the projection 15 extend through the openings 21 21, formed for them in the adjacent edges of the parts .A A', of the case or shell. f

A pair of similar-shaped tumblers 22 22 are placed'within the slide-bolt and separated by the spacing-block 23. These tumbleis are each provided with openings 24 24, within which the wards of the key turn. A small spring 25 is secured in each of these tumblers,

the object of the same being to hold the tum-y ICO ing inwardly from the walls of the case in order to hold the tumblers against the bolt to lock the latter. To unlock the bolt, the key is turned, and by its contact within the openings 2i 24 the restricted ends of the tumblers are first thrown back out of engagement with the locking-lugs 2S 28 and then endwise out of contact with the bolt Ll, and to lock it again the reverse movement of the tumblers takes place. Y

In Order to force the bolt outward when otherwise disengaged, a small spring-actuated lever 30 is pivoted at one end on the bearings 3l 3l. One end of this spring' extends into a recess made for it in the lever, and the free end rests behind a lug 32 on the case, so that its tension is all directed outward upon the bolt. In lieu of the lever and l spring such a spring as that shown in Fig. S may be used. This spring consists of a spring-wire coiled at the center, where it receives the bearings, and arranged so that one end engages the bolt 4 and the other the lng 32. A spring-actuated pawl 33 extends loosely in the casing of the lock, and its inner end is thrust normally inward by the action of the spring 34, where it engages a shoulder 35, formed for it in the bolt to lock the latter in the c ase immediately upon being drawn back. The outer end of this pawl extends outside of the case, where it terminates with the enlarged flattened head 36, and this head is guarded by a semicircular iiange 37. A lug 3S, formed on the catclrplate 39 in the doorframe, strikes this head as the door is closed, forcing it inward, and thus disengaging the pawl from the shoulder 35 on the bolt. The spring of the lever 30, which has been contracted by forcing the bolt back, now forces the bolt outward, due to its expansible force.

Then the knobs are turned, the bolt is again withdrawn and the pawl at once locks it as before, and this action may be repeated as long as the bolt remains unlocked. lVhen locked, it is impossible to move the belt one way or the other.

In Fig. 10 a slightly-moditled form of catch for the bolt is shown. l In this case it consists simply of a wire bent to engage a lug on the bolt.

It is evident that slight changes might be resorted to in the form and arrangement of the several parts described without departing from the spirit and 'scope of my invention, and hence I do not wish to limit myself to the exact construction herein set forth; but,

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is i l. In a lock, the combination, with a case, a spring-actuated sliding bolt and tumbler for locking the bolt, of a locking device adapted to automatically engage the bolt when the latter `is withdrawn and adapted to automatically release the bolt when the door is closed, substantially as set forth.

2. Ina lock, the combination, with a case having lugs on its inner wall, a slide-bolt, and tumblers havin gs notches therein adapted to receive the lugs on the inner wall of the case, whereby the tumblers are locked, of a locking device adapted to automatically engage the bolt when the latter is withdrawn and adapted to automatically release the bolt when the door is closed, substantially as set forth.

3. The combination, with a case, a springactuated slide-bolt therein, and a tumbler or tumblers for locking the bolt, of a springactuated pawl, one end of which extends into the casin g to engage the bolt when withdrawn and the other end out of the casing, anda catch-plate having a lug thereon adapted to strike the pawl when the door is closed in order to automatically disengage the bolt, substantially as set forth.

a. The combination, with a two-part cylindrical case having fiattened bearings therein, a face-plate rigidly secured to one part, and means for securing the parts of the case together, of a slide-bolt resting on the bearings, said bolt having an open center and a spring for forcing the bolt forward, a spring locking-pawl, loose sliding tumblers, a slide-plate which engages the bolt, and a sleeve bearing a projection thereon adapted to force the plate and bolt backward, and a catch-plate having a lug thereon adapted to strike the spring locking-pawl when the door is closed to automatically throw the latter outward, substantially as set forth.

5. The combination,A with a case and a spring-actuated slide-bolt therein, of a springactuated pawl, one end of which extends into the casing to engage the bolt when withdrawn and the other end out at one side of the casing and terminating flush with the end of the lock-case, and a catch-plate having a vlug thereon adapted to strike the pawl when the door is closed in order to automatically disengage the bolt, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

OSBORN R. COOKE. lVitnesses:

HENRY C. JONES, FLORENCE HARRIS.

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